As of June 2007, there are 59,549 active online serials in the Ulrich's knowledgebase. Many of these e-serials represent electronic editions of publications that have been around for years in a print format, or which have become available at the same time as a new print launch. Yet a significant number of e-resources are produced solely in electronic format. The number of online-only publications approaches 7,089 and their frequencies of publication vary widely. While 1,198 of these online-only serials are published on a monthly basis, the largest number (1,656 titles) are published only on an irregular basis. What types of publications are published in online-only formats? You can learn more about them by exploring the Subtype and Special Features charts.

Of the 7,089 online-only serials present in Ulrich's as of June 2007, it may be no surprise to learn that Academic/Scholarly publications make up the largest segment by serial subtype. Whether produced as subscription-based e-resources by commercial publishers and scholarly societies or published as Open Access journals, the 2,354 Academic/Scholarly online-only serials clearly lead the way in bringing electronic full-text resources to researchers across all disciplines. For business-to-business information, Trade publications represent a growing number of titles that are launched in online-only formats. To learn more about the publication cycles of online-only serials, explore the Frequency chart. The Special Features chart will give you insight into the different types of coverage and quality measures that Ulrich's tracks for these and other online-only serials worldwide.

A wide variety of serials make up the e-resources that are available only in electronic format. This group of 7,089 publications can be further explored in Ulrichsweb.com using the Features and Attributes search and browse options. Almost 18% of these titles (1,262 titles) are Refereed and over 16% (1,120 titles) are covered by an Abstracting & Indexing service. The growing importance and availability of online-only publications is reflected in the increased number of these titles that are recommended by Magazines for Libraries, whose title-level reviews are included in Ulrichsweb.com. In addition, some 472 online-only publications appear in Ulrich's with a Copyright Clearance Center registration flag, which lets users know when a title can be found in the CCC's extensive rights licensing database (with links to Permissions Direct for mutual subscribers). To learn more about the different types of online-only publications, explore the Subtype and Frequency charts.

The Ulrich's database covers serials worldwide and includes publications in more than 190 languages. Among the largest number of non-English language serials in Ulrich's are those published in Spanish. Overall there are more than 12,000 actively published Spanish-language serials in the Ulrich's knowledgebase representing newspapers and magazines as well as journals in all subject disciplines from Art, History, and Literature to Medical Sciences, Transportation, and Engineering. Among them are 2,725 titles available electronically. The launch of Spanish-language online publications grew most heavily in the years from 1995 through 2001, but several hundred new publications have come on the scene through the 2006 launch year. You can explore more about all of these publications—and other non-English language print and electronic serials—using the Language search and browse indexes in Ulrichsweb.com.

Online publications are launched every year. A growing number are being published with no print equivalent. How many of these online-only serials continue publication after their first few years? Of the 5,121 online-only serials launched since 1990, fewer than 4% (187 titles) had ceased publication as of December 2006. An amazing 96% of these serials are still available and actively published! What does this say about electronic resources? That they continue to find audiences among researchers, consumers and information users around the world who increasingly rely on electronic delivery of serials information. To learn more about the online-only journals, magazines, and other resources that are found in Ulrichsweb.com, explore the Frequency, Subtype, and Special Features charts.